Steady advances by insurgents on key fronts in Syria mean President Bashar al-Assad is under more military pressure than at any point in the four-year-old war. Losses in the north, east and south to groups including al Qaeda's Syrian arm and Islamic State may test Assad's hold...

The United States has accused the Syrian military of carrying out air strikes to help Islamic State fighters advance around the northern city of Aleppo, messages posted on the U.S. Embassy Syria official Twitter feed said. Islamic State fighters pushed back rival insurgents north of Aleppo on...

 The Nusra Front claimed Tuesday that it had killed several Hezbollah militants and confiscated their weapons in an attack on two of the party’s outposts near Arsal’s outskirts. The jihadi group announced on its Twitter account that its militants attacked two Hezbollah positions...

Russia Tuesday urged a U.S.-led coalition fighting against ISIS to coordinate their air raids with the Syrian government, warning that jihadis could go "very far" if not stopped. "It is absolutely clear to me it was a mistake - still is - not to coordinate the air strikes with the activities of...